Friday, July 19, 2013 3:30 pm
-
4:30 pm
EDT (GMT -04:00)
Computational and Cryptanalytic consequences of time travel
| Speaker: | Debbie Leung |
|---|---|
| Affiliation: | University of Waterloo |
| Room: | Mathematics and Computer Building (MC) 5158 |
Abstract:
We
focus
on
two
particular
models
of
closed
time
like
curves.
The
first
is
Deutsch's
1991
mixed-state-fixed-point
model
which
abolishes
the
grandfather
paradox.
The
second
is
due
to
Bennett
and
Schumacher,
in
which
the
grandfather
paradox
on
certain
initial
states
is
exploited
as
a
putative
physical
mechanism
for
post-selection.
We
discuss
possible
consequences
of
the
existence
of
such
closed
timelike
curves
on
quantum
information
processing.
Joint
work
with
Charles
Bennett,
Graeme
Smith,
and
John
Smolin
from
IBM
TJ
Watson
Research
Center.